From dce4ee6592d33854cb118014f8ff0fc2fd5e1124 Mon Sep 17 00:00:00 2001
From: =?utf8?q?David=20=E2=80=98Bombe=E2=80=99=20Roden?=
 <bombe@pterodactylus.net>
Date: Wed, 2 Jan 2013 11:06:52 +0100
Subject: [PATCH] Add abstract State implementation.

---
 .../reactor/states/AbstractState.java              | 98 ++++++++++++++++++++++
 1 file changed, 98 insertions(+)
 create mode 100644 src/main/java/net/pterodactylus/reactor/states/AbstractState.java

diff --git a/src/main/java/net/pterodactylus/reactor/states/AbstractState.java b/src/main/java/net/pterodactylus/reactor/states/AbstractState.java
new file mode 100644
index 0000000..e35c933
--- /dev/null
+++ b/src/main/java/net/pterodactylus/reactor/states/AbstractState.java
@@ -0,0 +1,98 @@
+/*
+ * Reactor - AbstractState.java - Copyright © 2013 David Roden
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package net.pterodactylus.reactor.states;
+
+import net.pterodactylus.reactor.State;
+
+/**
+ * Abstract implementation of a {@link State} that knows about the basic
+ * attributes of a {@link State}.
+ *
+ * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
+ */
+public abstract class AbstractState implements State {
+
+	/** Whether the state was successfully retrieved. */
+	private final boolean success;
+
+	/** The optional exception that occured while retrieving the state. */
+	private final Throwable exception;
+
+	/**
+	 * Creates a new successful state.
+	 */
+	protected AbstractState() {
+		this(true);
+	}
+
+	/**
+	 * Creates a new state.
+	 *
+	 * @param success
+	 *            {@code true} if the state is successful, {@code false}
+	 *            otherwise
+	 */
+	protected AbstractState(boolean success) {
+		this(success, null);
+	}
+
+	/**
+	 * Creates a new non-successful state with the given exception.
+	 *
+	 * @param exception
+	 *            The exception that occured while retrieving the state
+	 */
+	protected AbstractState(Throwable exception) {
+		this(false, exception);
+	}
+
+	/**
+	 * Creates a new state.
+	 *
+	 * @param success
+	 *            {@code true} if the state is successful, {@code false}
+	 *            otherwise
+	 * @param exception
+	 *            The exception that occured while retrieving the state
+	 */
+	protected AbstractState(boolean success, Throwable exception) {
+		this.success = success;
+		this.exception = exception;
+	}
+
+	//
+	// STATE METHODS
+	//
+
+	/**
+	 * {@inheritDoc}
+	 */
+	@Override
+	public boolean success() {
+		return success;
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	@Override
+	public Throwable exception() {
+		return exception;
+	}
+
+}
-- 
2.7.4